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  #1 (permalink)  
Old 10-17-2006, 06:37 PM
curtis73's Avatar
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Guess my peak power and win....

Ok, so you don't win anything.

I'm building an engine and I've run a hundred permutations through desktop dyno, but its not returning reliable results. Its saying that my peak HP will be higher than I think it should be. So, I need you all to guess crankshaft hp AND the peak's RPM. I'll be actually dyno-ing this engine in a couple months, so we all get to see who's closest.

-chevy 355
-9.15:1 CR, good quench, about .025" in the hole
-Vortec 906 heads, very light pocket porting
-stock valves, 1.94/1.5"
-performer intake, Qjet carb
-high performance manifolds... I'd guess about halfway between a stock manifold and small headers as far as performance.
-cam is melling part number 22124 flat hydraulic, 202/213 duration @50, 1.6 rockers for .428/.437 lift on a 110 LSA

I need your opinions on what RPM peak HP will be, how much HP you think it will be, and maybe even a guess on torque if you want.

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  #2 (permalink)  
Old 10-17-2006, 07:19 PM
Bumpstick's Avatar
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Gotta be first...

peak @ 5200/338hp (best pull)

torque @3400/376 ft lbs...
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Old 10-17-2006, 07:40 PM
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Guess I'll be second? LOL

peak @ 8200/188hp (don't mind the scattered parts)

torque @2400/66 ft lbs
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  #4 (permalink)  
Old 10-18-2006, 05:55 AM
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If I win this do I get a beer or do I have to guess where the vortecs will crack to do that?
308 hp @5400, 355lb/ft @ 3300.
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Old 10-18-2006, 06:16 AM
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RPMиииииииииии1000ииии1500ииии2000ииии2500ииии3000 ииии3500ииии4000ииии4500ииии5000ииии5500
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  #6 (permalink)  
Old 10-18-2006, 09:22 AM
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324 Hp@5250
357 Tq@3500
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Old 10-18-2006, 09:23 AM
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I would say 330 hp @ ~5000 RPM 370 ft lbs @ ~3600 RPM

Adam

Last edited by firestone; 10-18-2006 at 10:43 AM.
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Old 10-18-2006, 09:29 AM
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There are 1293 jellybeans in the jar..............................

Well, that is about as close as I am going to get....

My guess, and I stress..."Guess" is......

327hp@5300 rpm
345 lbs of torque @ 3300rpm

What do I win besides a jar of jellybeans?
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Old 10-18-2006, 05:00 PM
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12 horsepower
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Old 10-18-2006, 05:14 PM
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Quote:
Originally Posted by NAIRB
12 horsepower

Doc here...


Uuuuhhhh.. and would that be with the cutting blade and bagger attached ?

Gee. I missed something..could have sworn he said SBC not B&S..(Briggs and Stratten) But then , My eyesight is poor..

(sorry, Couldn't resist..)

Doc
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Old 10-18-2006, 05:18 PM
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Nairb is still with us. Welcome back. I'll be in Coldwater on the 9th of Nov.

Trees
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  #12 (permalink)  
Old 10-18-2006, 06:12 PM
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Thanks all for the guesses. I know there is a bit of a mismatch in peak flow and cam duration; that is to say the vortecs flow more than I need with this cam, but do you really think that hp will peak above 5000?

I was thinking more like 4800-4900, some have said as low as 4600. Desktop Dyno is telling me 5000.

Keep the guesses coming. I personally have to reject the obvious ones, but I do have to laugh at
Quote:
peak @ 8200/188hp (don't mind the scattered parts)
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Old 10-18-2006, 06:56 PM
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Quote:
Originally Posted by trees
Nairb is still with us. Welcome back. I'll be in Coldwater on the 9th of Nov.

Trees
I am still with you, but Trees, I moved to Lincoln Nebraska.

I now work as a tech with Speedway Motors. I couldn't handle the prosperity of Cimarron any longer.

Brian
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Old 10-18-2006, 07:00 PM
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Lincoln huh, that's where I live. How long have you lived here?

Adam
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Old 10-18-2006, 07:09 PM
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Quote:
Originally Posted by docvette
Doc here...


Uuuuhhhh.. and would that be with the cutting blade and bagger attached ?

Gee. I missed something..could have sworn he said SBC not B&S..(Briggs and Stratten) But then , My eyesight is poor..

(sorry, Couldn't resist..)

Doc
it only takes approx 9 hp to move a car down the road at 70 MPH. he's figuring on a high performance engine
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